More comments related to yesterday’s big story about stratus cloud breakup (Carbon Brief). The story itself has been widely publicized, made interesting by its’ more sensational elements. The underlying theory is full of nuances that make it less fearsome, but it still comes across as the best explanation for a real event that occurred when the planet was much hotter to start with. It is also an interesting way of showing how important clouds are in regulating temperatures, implying that other changes in their structure might be possible and could have some sort of significant impact on the climate, closer in time, under less extreme conditions.
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Researchers find an added reason for concern over the resilience of the Amazon rainforest to changes in climate. Specifically, changes in the existing pattern of regular rainfall appear to carry the risk of causing the conversion of such forests to savanna. “The question is, how much change can the Amazon forest cope with? It turns out that while the Amazon is an ancient ecosystem with the ability to adapt over long time-scales, it might not be able to keep up with the pace of ongoing climate change.”
https://phys.org/news/2019-02-amazon-forest-higher-rainfall-variability.html
https://phys.org/news/2019-02-amazon-forest-higher-rainfall-variability.html
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‘Renewable hydrogen’ promises to have a bright future (Carbon Brief). There is a report that hydrogen made with renewable electricity from wind power is already cost competitive for certain niche applications. Other studies look forward to further cost reductions that will make hydrogen fully competitive with natural gas as a fuel source in some locations over the next ten to fifteen years.
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Science now confirms that human activity as the cause of climate change is a fully established fact (Reuters). There is no longer any shred of evidence for doubt about something many of us have long felt was perfectly obvious. Even the American public at large is now getting the message: “Sixty-two percent of Americans polled in 2018 believed that climate change has a human cause, up from 47 percent in 2013, according to the Yale Program on Climate Change Communication.” (The Climate Letter originated in 2013 and should thus get a small part of the credit for that shift!)
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Another large iceberg is getting set to break off from an ice shelf in Antarctica. This one, from the Brunt Ice Shelf, is significant not for its size but for the fact that it is positioned in East Antarctica, where the ice is considered to be much more stable than in the West. “NASA scientists said the crack had been stable for about 35 years, but has since been creeping north at a pace of about 2.5 miles per year.”
Carl